This is definitely the result of unintended consequences.
They added specific lanes for nationals to use; nationals are the taxpayers therefore they're the ones who are most listened to. As a consequence the nationals lines were always fast and well staffed, while the international entry lines grew longer and longer.
If they hadn't have split the lines, everyone would be on the same "side" and complaints from nationals would result in improved passport control for everyone.
They added specific lanes for nationals to use; nationals are the taxpayers therefore they're the ones who are most listened to. As a consequence the nationals lines were always fast and well staffed, while the international entry lines grew longer and longer.
If they hadn't have split the lines, everyone would be on the same "side" and complaints from nationals would result in improved passport control for everyone.